Trijicon ACOG help?


June 1, 2010, 04:28 PM
I'm looking for the right Trijicon ACOG scope for my 5.56mm rifle. I would really appreciate any opinions that you guys have! I've narrowed it down to three choices:




Any opinions?

If you enjoyed reading about "Trijicon ACOG help?" here in archive, you'll LOVE our community. Come join today for the full version!
June 1, 2010, 04:54 PM
I used a 4x model on my service rifle, it had the standard chevron reticle and the BDC. I loved it, as did everyone in my unit. Held zero even when beat, accurate, good glass, no batteries to run out. I would defanitely have bought one for my personal rifle, but I decided to go with a 1-4 scope.

Tully M. Pick
June 1, 2010, 06:01 PM
I've had a TA01NSN for several years and want to get a TA31RCO-M4, but the damned thing won't break. I picked up mine used on arfcom and have definitely gotten my money out of it since. A buddy of mine liked it so much he went out and picked one up brand new after being unable to replicate my deal. Unfortunately, I'm going to have to save up and buy another AR just to mount the new one on.

June 2, 2010, 03:14 AM
Correct me if I'm wrong, but aren't the TA31RCO-m4 and the TA31RCO-M150 specific to barrel length?

June 2, 2010, 02:24 PM

I have one of these on my S&W M&P15A and love it.


June 5, 2010, 03:11 PM
Thanks so much for the opinions! They will help me indefinitely.

Harley Rider 55
June 5, 2010, 06:12 PM
The BDC reticle on the TA01NSN is for an 16" barrel M4 shooting NATO ammo.

June 15, 2010, 11:21 AM
Can someone explain why these scopes are so wonderful? I know it has to be more than "fan-boy love" for them...

June 16, 2010, 04:12 PM
They are compact and light weight but still extremely durable. The glass is very nice. Bright, clear, and parallax free. They have tritium illumination for low-light and night use. Some models also have fiber-optic illumination giving you an illuminated reticle in daylight (which allows you to use it with both eyes open and be fairly fast up close). Most of them have bullet drop compensating reticles. And their eye-relief is such that they work well with an AR-15 type platform.

June 17, 2010, 10:22 AM

I guess that explains it then. Thanks...

June 21, 2010, 01:36 PM
Comin' in late, but the TA11 has much better eye relief, I would lean towards that one, despite the 0.5x magnification penalty.


Zak Smith
June 22, 2010, 12:15 AM
TA11 is a better scope
article | Fighting Carbine Optics (
article | Evolution of the 3-Gun Practical Rifle (
article | First Look at Trijicon's new TA11 with Green Horse-Shoe Reticle (

Double Naught Spy
June 22, 2010, 12:36 AM
Avoid anything with a donut reticle and you can't go wrong with ACOGs. Even the donut reticle isn't too bad, but it isn't as good as the others.

Zak Smith
June 22, 2010, 12:41 AM
The donut is very versatile. I have used a TA11 with donut since 2003 for 3Gun competition, and it is probably the dominant reticle used by 3Gunners in the TA11. The only TA31/TA11 reticle I specifically recommend against is the triangle.

Double Naught Spy
June 22, 2010, 07:41 AM
See, and I liked the triangle better than the donut. I have have a TA11 with the donut for 8 years now and have had it on several guns. It is quite useful, no doubt about it, but I think it is the worst current offering based on my experience, but think all the offerings are at worst pretty good. Maybe if I wanted another red dot for competition, I might think more highly of it.

June 22, 2010, 11:43 AM
See, and I liked the triangle better than the donut.Me too, I like the more traditional reticles (newer offerings) better than both, but I don't care for the doughnut at all. Must be why they make more than one. ;)

Zak Smith
June 22, 2010, 11:51 AM
The problem with the triangle (not the chevron) is that it is "solid" and will obscure the point of aim in the approx 150-350 yard regime depending on barrel, ammo, conditions, etc. The donut and chevron both are sparse (or "hollow" enough, although technically not true for the chevron) to provide aiming points in that regime. At 100 yards the donut is precise enough to shoot 1/3 moa groups (by best with it) if you are capable of it.

Double Naught Spy
June 22, 2010, 12:22 PM
Well, if you can find the hole in the donut useful for your tasks, that is great. I find the hole too small for any sort of quick precise work.

At 100 yards the donut is precise enough to shoot 1/3 moa groups (by best with it) if you are capable of it.

I watched a guy shoot a sub MOA group with a large (50mm) red dot site with a 6 MOA solid red dot on an 16" AR15. So the dot covered 6" of the target and he still shot a group that was less than 1" and had no magnification. It isn't the precision of the reticle that is in question, just how useful it is to most people. The reticle is made very precisely, no doubt about it. If you put the reticle in the exact same place for every shot, the precision will be the issue then with the gun and and the bullet, not with the reticle. People often have trouble putting round reticles in the exact same spot unless lining up with circular targets or multiple edges.

If it works for you, that is great.

Zak Smith
June 22, 2010, 01:02 PM
Once you're past about 150 yards the tip of the triangle is not the point of aim anyway - it's somewhere under the tip of the triangle but above the bottom of the triangle (ie masked under the solid triangle itself).

The donut is zeroed with the top surface of the donut at 100 yards (meters) and the hold points between about 150 and 350 yards using the inside top, center of the "hole", inside bottom, and outside bottom.

June 22, 2010, 01:28 PM
Correction: I was thinking of the chevron, I don't care for the solid triangle either.


June 22, 2010, 01:30 PM
Get the TA31RCO-M4. Shoot off the point of the chevron and the bullet will drop a bit into the torso. The USMC uses it for a reason.

Zak Smith
June 22, 2010, 02:33 PM
You can do the same with the TA11B/E/F and have better target acquisition performance on the move, from improvised positions, weak sided, etc due to the optical characteristics of the TA11 vs the TA31.

June 22, 2010, 09:02 PM
Have to agree with Zak here. I prefer my TA-11 with the donut also. But that is why Bryers has 56 or so flavors. Either way can't go wrong with an ACOG


If you enjoyed reading about "Trijicon ACOG help?" here in archive, you'll LOVE our community. Come join today for the full version!